the first way they get it is through -- passed along nsa intercepts. the second way they get it from regular informants. the third way they get it is from a large data base of telephone and internet data collected inside the united states. and the fourth way is through wiretaps from one investigation and applying it to the next investigation. and what they do is they pass these tips along to agents in the field. when the agents are released to make arrests, a traffic stop, they'll pull somebody over for speeding or for a taillight that's out on a pretext, and then after the person is arrested, they won't tell them the true reason why they were pulled over. what the original source of the investigation was. >> if that is -- i recognize that that's not unique to this special operations division of the dea as you documented in your reporting that law enforcement sometimes does this to essentially launder the original source of what leads to a prosecution. but in that case, how can a person fully defend themselves if they're not able to follow the informat